<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>权限列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色区域列表 -->
      <el-table :data="rolesList" style="width: 1107px;" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom',i1===0?'bdtop':'','v-conter']"
              v-for="(item1,i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级与三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套 -->
                <el-row
                  v-for="( item2,i2) in item1.children"
                  :key="item2.id"
                  :class="[i2===0?'':'bdtop','v-conter']"
                >
                  <el-col :span="6">
                    <el-tag
                      closable
                      type="success"
                      @close="removeRightById(scope.row,item2.id)"
                    >{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      closable
                      v-for="(item3,i3) in item2.children"
                      :key="item3.id"
                      @close="removeRightById(scope.row,item3.id)"
                    >{{ item3.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column prop="roleName" label="角色名称"></el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-search">编辑</el-button>
            <el-button size="mini" type="warning" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="danger" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!--分配权限  -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClose">
      <el-tree :data="roleslist" ref="treeRef" :props="treeProps" show-checkbox default-expand-all node-key="id" :default-checked-keys="defKeys"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      rolesList: [],
      setRightDialogVisible:false,
      roleslist:[],
      treeProps:{
          label:'authName',
          children:'children'
      },
      defKeys:[],
      keys:[],
      // 当前分配的id
      roleId:''
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取列表失败");
      }
      this.rolesList = res.data;
    //   console.log(this.rolesList);
    },
    async removeRightById(roleId, rightId) {
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);
      if (confirmResult !== "confirm") {
        return this.$message.error("取消了删除");
      }
      const { data: res } = await this.$http.delete(
        `roles/${roleId.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除失败");
      }
      roleId.children = res.data;
    },
    // 展示分配权限对话框
   async showSetRightDialog(role){
     this.roleId=role.id
       const {data:res}=await this.$http.get('rights/tree')
       if(res.meta.status!==200){
           return this.$message.error('获取权限列表失败')
       }
       this.roleslist=res.data
    //    递归获取三级节点的id
        this.getLeafKeys(role,this.defKeys)
       this.setRightDialogVisible=true
    },
    getLeafKeys(node,arr){
        // 如果node节点不包括children属性 则是三级节点
        if(!node.children){
            return arr.push(node.id)
        }
        node.children.forEach(item => this.getLeafKeys(item,arr));
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClose(){
        this.defKeys=[]
    },
    // 
   async allotRights(){
      const keys=[
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.setHalfCheckedKeys()
      ]
      const idStr=keys.join(',')
      const {data:res}=await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      if(res.meta.status!==200){
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible=false
    }
  }
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
</style>